tumor systematic approach脑肿瘤mr诊断英文版课件

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1、BrainTumor-SystematicApproachbyRobinSmithuisandWalterMontanera河南省人民医院放射科高明译讲IntroductionIncidenceofCNStumorsAgedistributionTumorspreadIntra-versusExtraaxialMidlinecrossingMultifocaldiseaseCorticalbasedtumorsCTandMRCharacteristicsFat-Calcification-CystHighonT1LowonT2Dif

2、fusionweightedimagingPerfusionImagingEnhancementDifferentialdiagnosisforspecificanatomicareaSkullbaseSella/suprasellarCerebello-pontineanglePinealregionIntraventricular4thventricleTumorMimicsSchwannomalocatedinthecerebellopontineangle(CPA)withtypicalsignsofanextraaxial

3、tumorMeningiomawithabroadduralbaseandaduraltail，hyperostosisintheadjacentbone，enhanceshomogeneously，noblood-brain-barrierMelanomametastasiswithgraymatterontheanteromedialsideofthelesion(redarrow)，intra-axial.Ependymomawithextensiontothecerebellopontineangle(bluearrow)an

4、dintotheforamenmagnum(redarrow)ortothecisternamagnaToassesstheextentofatumor.Anextra-axialtumorintheregionoftheleftcavernoussinuswithhomogeneousenhancementandabroadduraltail.Thisistypicalforameningioma.Actualextentofthistumorisgreaterthanexpected.Thetumorissituatedin

5、thepterygopalatinefossaandextendsintotheorbit.Italsospreadsanteriorlyintothemiddlecranialfossa.Considerationfortheeffectonthesurroundingstructures.Primarybraintumorsarederivedfrombraincellsandoftenhavelessmasseffectfortheirsizethanyouwouldexpect,duetotheirinfiltrativeg

6、rowth.Thereisnoenhancementsothiswouldprobablybealow-gradeastrocytomaTheabilityoftumorstocrossthemidlineGlioblastomamultiforme(GBM)frequentlycrossesthemidlinebyinfiltratingthewhitemattertractsofthecorpuscallosum.RadiationnecrosiscanlooklikerecurrentGBMandcansometimescros

7、sthemidline.Meningiomaisanextra-axialtumorandcanspreadalongthemeningestothecontralateralside.Lymphomaisusuallylocatednearthemidline.Epidermoidcystscancrossthemidlineviathesubarachnoidspace.MScanalsopresentasamasslesioninthecorpuscallosum.Left:MetastasesRight:Multiplemen

8、ingiomasandaschwannomainapatientwithNeurofibromatosisIIMultifocaldisease:MetastaticdiseaselymphomasMulticent